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All Journal Jurnal Teknik Sipil Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil
Justitiannisa, Innino
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Civil Engineering, Building, Construction & Architecture Engineering Transportation

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Cycle Tests and Structure Repair of Bridge Pier Models: Uji Siklus dan Perbaikan Struktur Model Pilar Jembatan Justitiannisa, Innino; Gunadi, Riawan
Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol. 12 No. 2 (2023): Cantilever
Publisher : Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35139/cantilever.v12i2.234

Abstract

This research was conducted in anticipation of the risk of fatal damage to the structure due to the earthquake. In this study, experiments were carried out on the test object in the form of a bridge pillar model, which consisted of 2 test steps. The cyclic test is in the form of a pier bridge model and is continued in step 2 in the form of repairs with grouting and carbon wrapping materials as well as conducting another cyclic test to evaluate the performance of the repair materials used. This study uses the pier model, which consists of two test objects, namely a column with dimensions of 0.25x0.25x1.68 meters and a column cap of 1.20x0.55x0.36 meters. This test provides a constant axial load of 0.2 fc’.Ag and a cyclic lateral load. Phase 1 testing was carried out until the drift ratio was 3.5%. The achieved lateral peak strength is 8,606 tonf with a drift ratio of 2.20%. Lateral strength experienced a decrease in peak lateral strength of 86.93%. The damage is dominated by shear cracks which are characterized by the number of cracks with a diagonal pattern. Structural performance analysis was carried out according to ACI 374.1-05. The results of the theoretical analysis of the peak strength of the pier model were 15.2144 tonnes in the tensile direction, while the experimental ones were 8.606 in the pushing direction and -7.812 in the pulling direction.
Experimental Study of Polymer Concrete Material with SBR Latex for Bridge Pier: Compressive Test, Tensile Test, and Workability on Cylinder and Steel Samples Justitiannisa, Innino; Gunadi, Riawan
Jurnal Teknik Sipil Vol 25, No 2 (2025): Vol 25, No 2 (2025): JURNAL TEKNIK SIPIL EDISI MEI 2025
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v25i2.91523

Abstract

Concrete is a fundamental material in civil engineering structures due to its high compressive strength and durability. However, its low tensile strength, high permeability, and tendency to crack under environmental and mechanical stress limit its long-term performance, especially in substructures such as bridge piers exposed to dynamic and aggressive conditions. This study investigates the effect of incorporating 10% Styrene-Butadiene Rubber (SBR) Latex by weight into a polymer-modified concrete mix. The objective is to evaluate its mechanical behavior and workability as a preliminary step toward application in full-scale bridge pier construction. The concrete was designed using the Ohama method, which considers the interaction between polymer content and water"“cement ratio, while a dry-mix method was adopted to ensure uniformity and ease of implementation in field applications. Laboratory testing was conducted to evaluate the compressive strength at curing ages of 3, 7, and 28 days using cylindrical specimens (150 mm × 300 mm). The tensile strength of reinforcing bars (Ø8 mm, Ø10 mm, and Ø16 mm) was evaluated using a Universal Testing Machine (UTM), while slump testing was conducted to determine workability. The results showed that the modified concrete reached a compressive strength of 29.86 MPa at 28 days, or 99.53% of the target strength (f"²c = 30 MPa). A slump value of 12 cm indicated improved cohesion and workability, while tensile tests confirmed the reinforcement"™s structural performance. A bridge pier prototype was also developed, with a column size of 0.25 × 0.25 × 1.68 m and a column head of 1.20 × 0.55 × 0.36 m. Overall, the incorporation of 10% SBR latex enhanced the mechanical and rheological properties of concrete, supporting its potential for use in durable bridge pier applications.
Co-Authors Riawan Gunadi